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非正交多址接入系统下行链路簇内用户数最大化研究
冯郑慧1, 李莉1, 林振1, 彭张节1,2
1.上海师范大学 信息与机电工程学院, 上海 200234;2.东南大学 信息与工程学院 移动通信国家重点实验室, 江苏 南京 211189
摘要:
针对非正交多址接入系统(NOMA)下行链路,基于系统吞吐量最大化原则,对簇内用户发射功率进行了最优分配,发现簇内用户数过多会导致簇内吞吐量下降,提出了给定吞吐量最小限值条件下簇内用户数最大值的估计方案.仿真结果显示:当给定吞吐量的最小限值为10 Mbit·s-1时,簇中所能包含的最大用户数为4.
关键词:  非正交多址接入(NOMA)  功率分配  用户配对
DOI:10.3969/J.ISSN.1000-5137.2019.01.003
分类号:
基金项目:国家自然科学基金青年科学基金(61701307)
Research on maximum number of users in downlink cluster of non-orthogonal multiple access system
FENG Zhenghui1, LI Li1, LIN Zhen1, PENG Zhangjie1,2
1.College of Information, Mechanical and Electrical Engineering, Shanghai Normal University, Shanghai 200234, China;2.National Mobile Communication Research Laboratory, School of Information Science and Engineering, Southeast University, Nanjing 211189, Jiangsu, China
Abstract:
For the downlink of non-orthogonal multiple access system,by use of the principle of system throughput maximization,the transmission power of intra-cluster users was allocated optimally.However it was discovered that the intra-cluster throughput declined with the excessive number of intra-cluster users.An estimation scheme of the maximum number of intra-cluster users under the given minimum throughput limit was proposed.Simulation results showed that the maximum number of users that could be included in a cluster was 4 when the minimum limit for a given throughput was subjected to 10 Mbit·s-1.
Key words:  non-orthogonal multiple access(NOMA)  power allocation  user pairing